At the stadium I work at, we have to open the cans of beer before the customer can leave. This one guy was trying to raise h*ck about me having to open it. I told him it was policy and the law that it had to be opened before he left my stand. I asked if he wanted to see a manager and he said yes, but the second I put my radio up to my mouth I hear him open the can he shows it to me and walks off. The guy behind him in line gave me a $5 tip.